python之1-100之间的总和，奇数和，偶数和

i = 1
sum = 0
while i <= 100:
    sum += i
    i += 1
print(sum)

i = 1
sum = 0
while i <= 100:
    if i % 2 != 0:
        sum += i
    i += 1
print(sum)

i = 1
sum = 0
while i <= 100:
    if i % 2 == 0:
        sum += i
    i += 1
print(sum)